Device for internal-combustion engines



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may 3@, WU J. J. BALDINE 2,09,755

DEVICE FOR INTERNAL-COMBUSTION ENGINES Filed Aug. 29, 1946 ATTORNEYPatented May 30, 1950 UNITED STATES, PATENT? DEVICEFORINTERNAL-COMBUSTION ENGINES;

J o seph J Baldi ne, Hnbbard, Ohio, Application August 29, 1946,,SerialNo. 693,662

1 Claim. (01.

and its speed tends to exceed the speed of the engine, the compressionof the engine acts as a brake, and this is a desirable feature,particularly when driving down hill. However, when the speed of theengine exceeds the speed for which the carburetor controls are adjusted,the engine develops a pumping action, producing a high vacuum whichdraws a rich mixture of gasoline and air from the carburetor into theengine cylinders. This mixture is too rich for complete combustion, andas a result a cloud of noxious gases and vapors are expelled from theen.- gine cylinders and to atmosphere through the exhaust pipe. This isparticularly noticeable when an automobile is going down hill, using itsengine as a, partial braking mediunn To circumvent this condition,free-wheeling was incorporated in automobiles, but this was foundundesirable, since braking action of the engine w as eliminated andexcessive wear on the brakes resulted.

The prior art also shows devices for admitting air to the intakemanifold of the engine when the engine is coasting, but these deviceshave not met with commercial success because of their complicated natureand/or because of their unreliability.

My invention provides a device which is simple in operation andinexpensive to manufacture. Further, my invention provides a devicewhich prevents stalling of the engine when the carburetor controls andthe engine are at idling speed.

Referring to the drawing accompanying this specification and formingpart of this application, there is shown, for purposes of illustration,an embodiment which my invention may assume, and in this drawing:

Figure l is a generally schematic perspective view illustrating anembodiment of my invention as applied to an internal combustion engine,and

ur 11 d ram ic l ep e e ati na ithe electrical wiring ,of th eembodiment shown in;

i ur R f ri t dn w ea ent ma bus tion engine E to; which the embodimentof the invention herein disclosed is applied, is provideda with; theusual intake manifold l0, Attached; to the intake box I I of the intakemanifpld is the usual carburetor l 2 which, as ,is customary, mixes r.nd; gaso ine f rra acel o th n a ema fo lcl -,lll Thecarbureton I 2hasthe usual throttle control, I3, to whi h s conneied raclcelew tor rqdf u All of theforegoing construction is Well known, and does notinitselfform part of; my invention,; cco di el l de a led descr t n er ofelietedunneces ry- Leading into the intake box ll of the intake m nifoldI D; s a p 5,. or up in ai t0 theintake,manifold,independently of thecar ret l mm n at ne ith an i l an r l whic a sq.

mayhem s an a d ons tion 'l D were: ciated that the air cleaner l!filterstheair pass ingto the intake manifold l 0;

he lve m m r. 8 ma be u oo t closed t qsition, 1 man th r; ab e .r annrl he, de:

scribed manner; being only for; purposes of ,illus:

tration.

heselenqid 2 here n d sc osed s so desi n d i that when it is energizedit will unseat the valve t emberu fitso s orr de f flow, of air r h arleaner J I to. t i te r of, th nt ke anifold An electrical switch 2| isrigidly attached to a part of the engine E, as for instance by a bracket22 carried by the intake box II. The switch 2| comprises a bridgingplate 23 and a pair of contacts 24, 25, and a spring 26 normally urgesthe bridging plate to engagement with the contacts.

Engagement between the bridging plate 23 and the contacts 24, 25 isbroken by movement of the accelerator rod l 4, and one method ofachieving this result is, as herein shown, to position the extremity 21of the accelerator rod in spaced relation from the contact with a pushbutton (not Passage of, air; through the pipe I5 is ntr l ed n a a e 6 hch, ay e oi ta dr ard construction, the intake port of the valve 15"shown) carried by the bridging plate when the engine is idling, but inposition to engage such push button and remove the bridging plate fromengagement with the contacts 24, 25 when the accelerator rod is moved toset the throttle control l 3 above engine-idling speed.

The contact 24 is connected, by conductor 28, to one end of a battery29, which may be the automobile battery, the other end of the batterybeing grounded, as shown at 30.

The contact 25 is connected, by conductor 3|, to one terminal of thesolenoid 20, the other terminal being connected, by conductor 32, to acontact 33 of an electrical switch 34, the other contact 35 of theswitch being grounded, as at 36. The switch 34 includes a bridging arm31 which is actuated by a governor device 38 of any wellknown standardmake. The governor device 38 is driven according to the speed of theengine, and conveniently, the governor device may be connected forrotation with the shaft of the electrical distributor of the engine E.

The governor device 38 is so constructed and :arranged that it moves thebridging arm 31 to bridge the contacts 33, 35 when the engine E isoperating above idling speed, but to break engagement with the contacts33, 35 when the engine is at idling speed.

In operation, when the driver of the automobile accelerates the engine,the accelerator rod It moves the bridging plate 23 from engagement withthe contacts 24, 25, thus breaking electrical circuit to the solenoid20. When the engine E gets above idling speed, the governor 38 will movethe bridging arm 3'? to position wherein it bridges the contacts 33, 35so that this part of the electrical circuit is in position to passelectrical current.

When the driver of the automobile releases the accelerator pedal, suchas when coasting with the engine engaged, or when going down hill usingthe engine as a partial brake, the extremity 21 of the accelerator rodI4 is withdrawn sufficiently so that the spring 26 urges the bridgingplate 23 of the switch 2| into engagement with the contacts 24, 25.

Since the engine E is operating above idling speed, the governor device38 is holding the bridge arm 31 of the switch 34 into engagement withthe contacts 33, 35. Thus, with the electrical switches 21 and 35 inclosed relation, an electrical circuit is established to energize thesolenoid 20.

Energization of the solenoid 23 causes its plunger to move the valvemember l8 away from its seat, so as to provide for flow of air from theatmosphere, through the air cleaner [1, the valve Hi, the pipe 35, andto the interior of the intake manifold l0.

Atmospheric air is drawn in by the vacuous condition existing within theintake manifold, and this air relieves the vacuum and prevents a gaso- 4line mixture from being drawn from the carburetor. Therefore, on a coastwith the engine engaged, atmospheric air, independent of the carburetorsupply, is drawn into the intake manifold.

When the engine reaches idling speed, the governor device 38automatically disengages the bridge arm 3'! from bridging contact withthe contacts 33, 35, so that the solenoid is deenergized to permit thevalve member 18 to close on flow of air through the valve l8, andcombustible mixture is again supplied by the carburetor to keep theengine from stalling.

By use of my invention, standard, time-tested, and inexpensive parts maybe used in a simple combination which is readily attached to an internalcombustion engine with little skill and elfort.

From the foregoing, it will be apparent to those skilled in the art thatI have accomplished at least the principal object of my invention, andit also will be apparent to those skilled in the art that the embodimentherein described may be variously changed and modified, withoutdeparting from the spirit of the invention, and that the invention iscapable of uses and has advantages not herein specifically described,hence it will be appreciated that the herein disclosed embodiment isillustrative only, and that my invention is not limited thereto.

I claim:

The combination with an accelerator rod controlled internal combustionengine having an intake manifold provided with a supplemental air feedcontrolled by a solenoid operated valve in an electrical circuit havinga normally open switch and normally closed switch, of means driven bythe electrical distributor of the engine to close the normally openswitch when the engine is operated above idling speed, said normallyclosed switch including a spring biased bridging plate across spacedcontacts in the circuit, and means for mounting said bridging contact inalinement with and normally spaced from an extremity of the acceleratorrod of the engine whereby upon longitudinal movement of the rod toaccelerate the engine above idling speed the normally closed switch isopened against spring pressure by the end engagement of the acceleratorrod with the bridging contact.

JOSEPH J. BALDINE.

REFERENCES @ITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,918,913 Isdahl July 18, 19332,022,094 Shoemaker et a1. Nov. 26, 1935 2,035,755 Vander Veer Mar. 31,1936

